Type:Carbon Monoxide Detectors Sensor Type:Electrochemical CO sensor Sensitive Level:5 PPM Overview: The product is carbon monoxide gas detector with human voice prompt and microprocessor control, supporting display of the gas concentration.This detector adopt electrochemical sensor which is stable and reliable. It keeps the place safe from the threats of carbon monoxide gas.This product can be well used in kitchen,bathroom, ect. Features: LCD display the carbon monoxide gas concentration from 000-999PPM. Human voice prompt, when reach the given alarm level, the detector will alarm and voice prompt. Adopting high reliable and stable electrochemical sensor,effectively detect the real-time CO gas and remind people. Low current consumption, ultra-long standby time. Silence your gas detector by immediately pressing the test button when non-emergency gas. Low battery warning. The LCD screen show LB and voice prompt attention please,low battery warning. Press the TEST/RESET button, can view the alarm levels. When the detector is in fault,it will displaying ERR. Specifications: Power Supply: 3 x 1.5V AAA batteries(not included) Sensor Type: Electrochemical CO sensor Sensitivity/Alarm Time: 50 ppm,within 60~90 minutes; 100 ppm,within 10~40 minutes; 300 ppm,within 3 minutes; 400ppm,immediately Temperature: 0-50 Celsius Degrees Relative Humidity:10%~95% Detecting Level Range:000~999PPM Error:+/-10% Normal Working Status:000PPM Alarm Concentration:030~999PPM Battery Status:Low battery warning Color: Black, White Item Size: Approx. 9.9 x 9.9 x 3.5cm(L*W*H) Item Weight: Approx.120g/4.21oz